The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Une analyse cladistique portant sur les Gymnospermes actuelles et fossiles (vingt taxa) est presentee et discutee avec une mention particuliere sur l'origine du Ginkgo biloba L. L'arbre consensuel parcimonieux obtenu a partir de 68 caracteres (59 informatifs) presente une branche monophyletique contenant l'ensemble des plantes portant des ovules a micropyles, pouvant etre nommees les <space>Micropylophytes<space>...
In the Lower Permian locality of Bou Rzem (Central Morroco), red pellite deposits have for the first time yielded a silicified wood with a well-preserved pith.This structure characterized by a typical secondary wood of Dadoxylon schrollianum type and primary vascular structure has a heterogeneous pith with nests of sclerenchyma including vertical secretory canals.A transfusion tissue is placed...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.